Plug type pipe closure



J. W GALLOP PLUG TYPE PIPE CLOSURE 2 Sheets-Sheet 1 Filed June 5, 1943 FIGZ.

'mvgju'roa V J.W.GA LLOP BY- v FIG.3.

ATTORNEY Nov; 21, 1944.

J. w. GALLOP 2,363,408

2 snee'ts-shetz Filed June 5, 1943 INVENTOR W.G ALLOP Patented Nov. 21, 1944 was PLUG 'rvPE PIPE CLOSURE M Joseph W. Gallop, East St.Louis, Ill., assignor to Key Company, East St. Louis, 111., a corporation of Missouri Application June 5, 1943, Serial No. 489,193

3 Claims. (01. 138--95) My invention relates to a plug type pipe closure such as that employed inconnection with refinery fittings or similar devices which are subjected to greatvariations in temperature and pressure during use in order to provide a reliable closure which may be readily removed to give access to the tubesgto-which such fittingsare applied.

.The presentinvention is specifically directed to variations. in the details of construction of the form of closure shown and described in my copendingapplication Serial No. 487,847, filed May 21, 1943. Like the form of closure shown'th'erein, the presentform employs, for seating the plug, inclinedplanes located on enclosed parts of the device rather than upon the. casing itself. Thus my invention obviates the use of screw threads for seating the plug and'consequently the employment of critical metal capable of being threaded, ,as well asthe use of taps and chasers for the formation of such threads. Further, the inclined planesfor seating th plug are so located that they are easilymachinedyThis would not be the caseif one of the planes, or coordinate sets of planes, were formed on the casing which,

particularly inwrefinery fittings,-is difiicult to machinebecause of its size and shape.

,In .the accompanying drawings, which show one formofmy invention embodied in a terminal fitting, Figure 1 is a vertical section; Figure 2 is a similar section takenlat right angles toFigure 1;

Flgure3 is a top plan view; Figure 4 is a-view similar to Figure'2 but showing the casing only;-

Figure' 5 is a cross section takenon the line 5-5 of Figure 2; Figure 6 is a side elevation of the vplug; Figures 7, 8 and 9 are bottom, top and side views, respectively, of the equalizing member; Figures 10 andll are bottom and side views, respectioned in said vent, a holding member, and an e equalizing member located between the holding member and the plug. In the drawings the casing I is a terminal fitting provided with a tapered vent 2 to give access to the tube (not shown) to which the fitting is applied by any suitable means, such as rolling the tube into serrations 3 on the fitting. The casing is provided with a flanged outlet 4. Formed on the interior of the upper end of the casing are a pair of oppositely disposed holding lugs 5. Each of these lugs preferably extends through an arc of about 90 and have their under bearing faces 6 machined flat. Surrounding vent 2 is a recess or counterbore l forming a gauge line formachining the faces 6 which must be-located accurately. Formed in opposite sides of the casing about flush with the upper end of the vent are two openings 8, preferably rectangular inform. Positioned on the inner surface of th casing adjacent the openings 8 are four locating'lugs disposed in two opposing pairs 9 and ,l-ll,,.respectively. Thus these two pairs of lugs provide two opposed pairs of recesses, one of which servesv to locate the plug andv the other the equalizing member, as will be described later. .It.wil1 be noted that the lengths of the lugs 9 and 10 are such'that the included angle A of one set, of recesses is somewhat greater than the included. angle A of the other set. 'Ihave found this arrangement'desirable in properly locating the parts. I a Seated'in the tapered vent opening 2 ma tapered plug II. On the upper face of the plug is a reduced portion 12 at opposite sides of which are lugs" l3 projecting beyond the .'main part of theplug. These lugscooperate with the ends of lugs 9- and lll to position the plug and to also form overhanging lips-to assist in releasing the plugifromitscseat by means of a pry bar or similar tool inserted. throughopenings 8 in the wall of the casing. Theupperface' of the reduced part 12 of the'plug' has a central recessed or ing, and the top .faces of said lugs l8 ar mav chined flat to cooperate with fiat faces 6 of lugs 5. Projecting downwardly from the under sides of lugs l8 are a pair of oppositely slanted inclined planes IQ for cooperation with a similar pair of planes on the equalizing member. On the upper face of member I1 is a hexagonal head 20 for engagement with a wrench. The holding member is also provided with a central opening 2| for the passage of a stud on the equalizing member.

The equalizing member has a disk-shaped body 22 on which are oppositely disposed projections 23. These projections, like lugs IS on the holding member, pass down between lugs 5 on the casing. The upper faces of these projections 23 form a pair of oppositely slanted inclined planes 24 for cooperation with inclined planes H! on the holding member. Extending 23 are a pair of lugs 25 for cooperation 'passingthrough opening 21 inhholding, member I1 and threaded to engage with nut 28 To assemble the device, plug 'H i vent-2 with its lugs I3 between lugs 9 arid l and facing openings 8. The equalizing member is now dropped into position and. givenljabout a one-quarter turn in a clockwise direction. This will allow its lugs 25 vto drop beiiween lugs 9 and V 10 until the lower concave face 28' contacts the convex ,zone l5 of the plug-'1" Th ockwise movement should be continueduntifi the forward ends of lugs 25 bear firmly against the adjacent edges of lugs I, thus, insuring the proper angulat-position of the-equalizing memben 'hThezhold ing; member H is now dropped; into position and given about one-quarter of a turn in a clockwise direction. This causes the? plug wibE IfDrCEdinto its seat due to: the wedging: action& of the: inclined planes i9" and 2*. To secure. suflicient pressure om the plug a wrench isapplied'to' hexagonal head 211i of the holding member. The cooperating spherical? faces li5 26: permit 'sufficient rocking movement of: the equalizing member: to compensate: for any slight: defects in: the cone struction: of: the device and thus insures: uni-form pressure throughout. the circumference; of the plug. After. the plugv has been properlysea-ted lockLn-ut 2% is: applied. to the: stem. to prevent ac cidental backing. off the hQldiHg' member through jar or any other cause.

Having fully described. my invention, what I claim as new" and: desire to secure by Letters Patent of. the United States is? 1-. In a: device oi the class: described,v the combinatiorr with. a casing having a: vent opening: and

aplurality" of inwardly protecting bearing: lugs,

clined planes acting between the equalizing and holding members tn apply'sesting pressure: to the tween said holding and equalizing members, and locking means between said latter named members to prevent accidental release of the seating pressure on the plug member.

2. In a device of the class described, the combination with a casing having a passage therethrough open at both ends, locking lugs on the casing, adiacentone end opening, means for securing a pipe in. the oppcsite and? opening, a vent in the casing positioned between the openings and giving access to the latter named one, a plug for the vent, a holding member engaging with. the. lugs on 'the casing by rotary movement tosecure saidv member in the casing, cam means comprising cooperating inclined planes each extending through less than a complete circumference, one of which planes is carried on the under partof' the holding member, an equalizing member located between the holding member plug member by relative movement beand the plug, said equalizing member carrying thesecond cooperating plane and having rocking engagement with theplug for imparting seating pressure. tcthe latter through rotary movement of: the: holding: member; and a locking stud carried by the equalizing member andengaging with the holding: member to prevent: accidentalrelease of the seating pressure on the plug.

3. In. a device of: the class: described, the combination. a casing having a passage therethrough open. at both ends, locking lugs on the casing. adjacent. one: end? opening", means: for securing apipe in the: opposite end opening, a vent in. the casing positioned between the openings and giving; access to the latternamed one, a plug r for. the vent, a holding member engaging with the: lugs onnthecasing by rotary movement to se cure said member in the casing; cam means comprising cooperating inclined planes each extending through less. than: a complete circumference, one of which planes is carried on the under part of the holding member; an equalizing member located between the holding member and the plug, said equalizing: Irremb'er carrying the second cooperating plane and having rocking en-- agement with the plug: for imparting seating pressure to the latterthroughrotary movement of" theholding member, a: pair-ct lugs on opposite sides of the plug, a second pair of lugs on opposite! sides of the equalizing member; and two pairs; of recessesin the casing wait singularlydisposed with respectto each other for engaging with the lugson the plug and equalizing member to locate said" parts: in proper position in the casinn.

JOS. W, GALLOP. 

